Paint filler and process of preparing it



106. COMPOSITIONS,

COATING OR PLASTIC.

Patented Oct. 26, 1926.

UNITED STATES PATENT OFFICE.

TANCREDE G. GAUDRY. OF MONTREAL. QUEBEC, CANADA. ASSIGNOR TO ARTHURHOOLAHAN. OF MONTREAL. CANADA.

PAINT FILLER AND PROCESS OF PREPARING IT.

No Drawin g.

This invention relates to a method or process of mixing and preparing)aint fillers or compositions adapted to be added to the coloringpigments in paints which have been used for decoration of exposedsurfaces. Other objects will appear from the description hereinafter setforth.

My invention consists essentially in preparing and mixing a compositionof ingredients which will readily mix with the oils and spirits used inthe manufacture of paint, and which will remain in suspension in thepaint for long periods, without precipitation or deterioration. Indescribing my process I will explain the various steps successively forpreparing a composition of approximately 100 gallons of paint filleradapted to be mixed in suitable proportions with the paint ingredients.

T 0 make a mixture of about 100 gallons of paint filler I first meltapproximately 4% pounds of commercial rosig under heat with a steampressure of about 25 pounds, thereby bringing the melted rosin to 2 ;12? F Steam is then shut off and about 1 gallon of wood alcohol ormethvlated spirits is mixed with tFe melted rosln. 1n effecting thismixture the alcohol is first poured slowly into the rosin until thelatter thins down when the rate of pouring may be increased until thealcohol is all in and thoroughly mixed. This mixture is then allowed tocool and will be referred to as mixture No. 1.

The next step consists in the preparation of a composition which will bereferred to as mixture No. 2 and is prepared in the following manner.Approximately 2 oz. of oxalic acid. 8 oz. of alum and 10 pounds of wasnn soda are tioroughly dissolved in twoto three gallons of water, thesolution 1923. Serial No. 638,662.

being made in a receptacle under a steam pressure of about. 25 pounds.Mixture X0. 1 is then mixed with solution Ame latter is still hot. hemateria s are then agitated until flie solutions are thoroughly mixed.

The third step consists in dissolving or mixing the followingingredients. separatel v. preferably under steam pressure. each in aboutone gallon of'water and then addin: each dissolved mixture in order.successively. to the composition produced by combining mixtures No. 1and No. 2. First. approximately 4 oz. of otassiuni' 'df'ssblved in onegallon of hot mder steam pressure, is added to the combined mixtures No.1 and No. 2. Second, approximately 5 oz. of zinc em piate thoroughlyagitated in one gadon 0 hot water, under steam pressure, is next addedto the mixture. Third, 2 to 3 pounds of su ar of lead or acetate of leadmixed in one gallon of hot water is a (e to the'mixture. Fourth, onepound of um arabic melted under steam pressure and mixed in one gallonof hot water is added to the mixture. Fifth, 5 oz. of caustic soddissolved in one gallon of water 15 added to the mixture and, finally,about 4 pounds of silicate of sodium. or water lass, dissolved in onegallon of hot wax {mm to the mixture which, uring ns period of mixing,is thoroughly agitated to bring all the ingredients into '"intiiii'atecontact. The whole mixture is then poured into approximately 90 gallonsof water and thoroughly agitated, when it is allowed to remain in a tankat a temperature of from 50 to 70 F. for approximately 2% hours. It isthen filtered after which it is ready for marketing to be mixed insuitable quantities with aints, oils or tur )entine spirits enteringinto the ECJTI-POSITIOD of paints.

The proportion of this filler to be mixed with paints may vary not onlywith the kind of paint, but with the purposes for which the paint is tobe used. For paints adapted for inside decoration and the likeapproximately'3'q'u 7aifs 'of 'filler may be mixed with one. gallon ofpaint. For paints employed for outsid e deeoration where surfaces areexposed to the weather3 to 4 uarts of filler may be mixed with one galon of paint. To produce a non-corrosive aint and for use onsurfacesex'po'sdto'sa t water, acid uids.

igljl or the like, I find that approximately 4 to 5 quarts of the fillermay be mixed with one gallon of paint.

This composition will mix readily and thoroughly with paint oils andvolatile liq- It will not precipitate to any extent but will remain insuspension in the paint and will add very'ifiat'rially to its adhesivequalities, to its freeness in spreading, to its resistance toatmospheric conditions, to its preservative qualities and to the lifeand stability of its coloring materials.

Having thus described my invention, what I claim is;

A process of preparing a paint filler which consists in first dissolvingrosin under steam pressure and then adding to the rosin. methylatedspirits, then mixing the solution with a second solutlon of oxalic acid,alum and Washing soda dissolved in Water, under steam pressure, thenadding to the composition, first, a mixture of potassium hydroxide,second, a solution of zinc sulphate in Water, third, a mixture ofacetate of lead in water, fourth, a solution of gum arabic in Water,fifth, a solution of caustic soda in water, sixth, a solution ofsilicate of sodium in water, then thoroughly stirring the completemixture in a large volume of water.

In witness whereof I have hereunto set my hand.

TANCREDE G. GAUDRY.

